How mutation is recognized?

*How a new mutation is formed, recognized, and declared*???

A new mutation in birds is declared or recognized by verifying that a novel, inherited physical trait (#phenotype) is distinct from existing mutations, #modifications, or #combinations, typically through purposeful breeding trials, #pedigree analysis, and, increasingly, #DNA testing.
The process involves proving that the colour or pattern is #genetic and not a temporary change, followed by documenting the #inheritance method (e.g., #recessive, #dominant, #sex-linked) over several generations.
Ornitho-Genetics